jewett



2 Sheets-Sheet 1,

(Model.-) I

G. M., 'JEWETT.

SASH BALANCE.

Patented Jan. 8,1884

N. PETERS. Phum-Lnm nmr. Wnhinghm. n. c.

Unites States Patent @rricn.

GEORGE M. JE\VETT, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE SMITH & EGGE MANUFACTURING COMPANY, OF SAME PLACE.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 291,740, dated January 8, 1884.

Application filed August I, 1SE3.

To (6 whom, it may concern:

Be it known that I, GEORGE M. .Tnwnrr, a citizen of the United States, residing at Bridgeport, in-the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Devices for Hanging Sashes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled 10 in the art to which it appertains to make and use the same.

My invention relates to certain novel and useful improvements in devices for hanging window-sashes, and has for its object to pro- 1 vide such a device whereby the sash may be suspended by double chains,while at the same time the strain shall be divided equally be tween the two chains, thereby compensating for unequal lengths thereof, and the chains shall always be kept at the same distance apart.

\Vith these ends in view my invention consists in the peculiar construction of the equalizers, the double pulley, the device for attaching the chains to the sash, the spring-hook for attaching the weight, and in the combinations of these elements, hereinafter fully and in de tail explained,and th'en specifically designated by the claims.

In order that those skilled in the art to which my invention appertains may more fully understand its construction and operation, I will proceed to describe the same in detail, referring by letter to the accompanying drawings, 5 forming part of this Specification, in which Figure 1 is a view ofsections of the j amb and the window, and also showing the manner of attaching the weight which is represented as hanging in the pocket; Fig. 2, a side eleva- 40 tion of the device for equalizing the strain on the two chains;- Fig. 3, a view of the double pulley; Figs. 4 and 5, detail views of the de vice for equalizing the strain on the chains; Fig. 6, a detail view of the device for attachin the chains to the sash' Fi 7 a view of the device for equalizing the strain on the chains, similar to Fig. 1, but illustrating one chain shorter than the other; Fig. 8, a view of said device, showing the relative normal positions of the slots in the same; and Fig. 9, a side view of the spring-hook.

Similar letters denote like parts in the several figures of the drawings.

A is the jamb or casement, withinwhich is secured in any ordinary manner the double pulley B.

C are chains arranged to run over said pulley, and secured to the sash by means of the fixture adapted to accommodate the links at the ends of the chains. This fixture I construct in two parts.

I) is a metallic thimble or plug, which is let into the edge of the sash near the-corner, (see dotted lines in Fig. 1,) and (Z (Z are two lugs upon said thimble, over which the ends of the 6 5 chains are placed, as shown in Fig. 6.

ll is a bracket having arms (l (1", which pass through the lower links of the chain. In practice the links are slipped over the arms, the lugs passing through the links the other way above the arms, and the whole fixture secured in the sash by a single screw. Thus it will be seen that the end of each chain has a double means of attachment to the sashviz., lugs (1 upon the thimble, and arms upon the bracket. Should either attachment by any means become broken, the other would be amply sutficient to sustain the weight upon it. My fixture, moreover, is economical in cost and is easily applied. The weight E is attached to the chains through the medium of a device consisting of three plates, F F G, the latter being confined between the two former by means of a rivet or pin, H. This rivet is passed through the plates in such a manner as 8 5 not to bind the latter, but to permit a free r0- tation of the same, for the purpose presently explained. These plates have elongated slots, those in the central plate, G, extending vertically, and those in the side plates, F, being horizontal in their normal position, as clearly shown at Figs. 4, 5, and s. It will of course be understood that the shape of these plates is not of the essence of my invention.

I represents open links or loops at the inner ends of the chains, which are slotted vertically, as shown at Figs. 1 and 7 These loops are attached to the plates F by means of headed pins J, passed through slots J in the loops and through the slots in plates F G, the pins being small enough to move freely within said slots. The upper ends of these slots are provided with enlargements, as at j, which permit the loops to be slipped over the heads of pins .I. I have adopted this construction for the reason that, owing to the unequal lengths of chain required in different buildings, it is not practicable to attach the chains to the equalizers before shipment. It will thus be seen that, although the chains might not be of exactly the same length, the difference in length would instantly be compensated for by the equalizer, and the same strain placed on each chain. As the slot-s in the central plate are vertical, it follows that, no matter how much variation or changing there may be in the relative length of the two chains, the chains always preserve their exact distance apart. This feature, in connection with the peculiar construction of the double pulley, renders kinking of the chains practically an impossibility. The pulley is provided with side fianges, B, and a central flange, B", which separates the chain-grooves. Each of these grooves has ledges b at the lower corners, upon which the wider portion of the chain rests, while the narrow but thicker portion of the chain rests in the groove between said ledges, thus supporting the chains at all points and preventing any lateral movement thereof, as well as any possible bending of the links. The weight E is attached to the' plate G, at the bottom thereof, by means of springhook K, the loop is of which engages the plate. la is the bow which engages with the weight. A short distance below the loopthe end of the wire is bent to form an eye, 75-, the other end, 76, being made hook shape to engage therewith. This construction of hook I have found to be less expensive to manufacture and easier to operate than any in use, and, moreover, to be absolutely secure against accidents of any kind.

The operation of myimprovement is as follows: Should one of the chains be shorter than the other, the strain will come on that side of the plates at which the shorter chain is attached, and the plates F will accordingly be turned, owingto their peculiar construction, as hereinbefore described, untilthe weight is distributed equally on each chain, as will be readily understood by reference to Fig. 7.

By the use of my improvement both chains are always taut, and the strain consequently is equally divided.

I do not wish to confine myself to the use of three plates in connection with my improvement, as this number may be varied without departing from the spirit of my invention, the gist of which rests in the broad idea of using two chains and in equalizing the strain thereon. I am thereby enabled to suspend the heaviest sashes with ordinary chains, thus avoiding the expense and inconvenience of heavy chains and doing away with cords, which are continually breaking and kinking.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a device for hanging sashes, the double chain attached to rotating side plates, in combination with the weight attached to the central plate, substantially as set forth.

2. The combination, with a pulley and two chains attached to the sash,- of a weight and a device for equalizing the strain 011 the chains, constructed substantially as set forth.

3. In a device for hanging sashes, loops I and horizontally-slotted plates F, in combination with vertically-slotted plate G and pins J.

4. A sash-pulley having flanges B B, for retaining and separating the chains, and ledges 1), upon which the wide portion of the chain rests, and between which the thicker portion rests, as described, and for the purpose set forth.

5. In a device for hanging sashes, plug or thimble D, having lugs d, over which the chains are. passed, in combination with bracket (1', having arms which pass through the ends of the chains, whereby each chain is given a double attachment to the sash.

6. A plate having vertical slots and plates riveted thereto, and having horizontal slots, 9;

in combination with two chains attached to loops, and pins passing through said loops and the plates, whereby unequal strain upon the chains is equalized, and they are always kept at an exact distance apart.

7. Loops I, having slots with an enlargement, as described, in combination with plates F and G- and pins J, whereby the parts may be adjusted to different lengths of chains.

In testimony whereof I aiiix my signature in presence of two witnesses.

GEORGE M. JEYVETT.

IVitncsses:

A. M. W'oosrnn, S. S. \VimJAMsoN.

IOC 

